[ih] SATNET (seismic data, Norway, UK)

[Vint Cerf]

we piggy-backed on the original NORSAR satellite link.

before UCL was put up on the ARPANET, only the NORSAR facility was  
connected by satellite.

Bob Kahn worked out an arrangement to increase the total capacity of  
the system and also arrange for UCL to be connected to the ARPANET.

initially NORSAR was connected to the ARPANET by a dedicated satellite  
connection. The capacity was increased and UCL was connected to NORSAR  
by land line.
The satellite ground station was at Tanum, Sweden I think.

Later, the Packet Satellite system was fielded via INTELSAT IVA and  
UCL was connected to the SATNET and the land line to NORSAR was  
removed. UCL was connected to the SATNET through a ground station at  
Goonhilly Downs, UK. NORSAR/NDRE was re-connected to the ARPANET by  
way of SATNET which also used a ground station at TANUM.




On Aug 15, 2009, at 8:32 AM, Johnny RYAN wrote:

> I have been confused by the distinction between A) the link to NORSAR
> and UCL from 1973 and B) the SATNET links to same from September 1975
> and late 1977. This is particularly confusing since the NORSAR link
> seems to have gone via the satellite earth station at Tanum in both
> cases (pre and during SATNET).
>
> Johnny
>
> --
> My Next Book... http://johnnyryan.wordpress.com/books/net- 
> history-2010/
>
>
>
>
> On Sat, Aug 15, 2009 at 10:22 AM, Vint Cerf<vint at google.com> wrote:
>> bob's paper will help. Larry Roberts initiated the program, Bob  
>> insisted
>> that the network be separable from ARPANET and that was part of his  
>> very
>> significant effort to develop the concept of "open" networking. We  
>> needed
>> packet satellite to serve ship-to-ship and ship-to-shore data  
>> communications
>> (in our conceptual model of using packet networking to aid in  
>> computer-based
>> command and control). Packet Radio was needed for ground and air  
>> mobile.
>> ARPANET was the prototype for wireline, land-based command and  
>> control.
>> These three networks, plus the ethernet invented at Xerox PARC  
>> formed the
>> basis for much of the Internet's architecture.
>>
>> vint
>>
>>
>> On Aug 14, 2009, at 9:42 PM, Johnny RYAN wrote:
>>
>>> please ignore my last re Kahn's paper (found it here
>>>
>>> http://ia300230.us.archive.org/3/items/TheIntroductionOfPacketSatelliteCommunication/)
>>>
>>>
>>> --
>>> My Next Book... http://johnnyryan.wordpress.com/books/net-history-2010/
>>>
>>>
>>>
>>>
>>> On Fri, Aug 14, 2009 at 10:51 PM, Johnny RYAN<johnnyryan1 at gmail.com>
>>> wrote:
>>>>
>>>> Dear Vint,
>>>> I had better examine this more to understand the reasoning behind  
>>>> SATNET
>>>> any pointers or source suggestions would be very welcome!
>>>> ( I cant find a text online for R.E. Kahn, "The Introduction of  
>>>> Packet
>>>> Satellite Communications," National Telecommunications Conference,
>>>> Nov. 1979, referenced in your RFC 829 )
>>>> Johnny
>>>>
>>>> --
>>>> My Next Book... http://johnnyryan.wordpress.com/books/net-history-2010/
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, Aug 14, 2009 at 9:53 PM, Vint Cerf<vint at google.com> wrote:
>>>>>
>>>>> well not exactly. the seismic stuff had its own dedicated  
>>>>> circuit. Bob
>>>>> Kahn
>>>>> successfully argued that we could provide higher speed service by
>>>>> sharing
>>>>> the satellite capacity between the seismic data and the internet  
>>>>> data
>>>>> and
>>>>> splitting the costs. But the seismic data itself was not  
>>>>> necessarily a
>>>>> driver of packet satellite as a technology.
>>>>>
>>>>> v
>>>>>
>>>>> On Aug 14, 2009, at 4:03 PM, Johnny RYAN wrote:
>>>>>
>>>>>> Dear All,
>>>>>>
>>>>>> Thanks you for your responses on Carterfone. But if I may be so  
>>>>>> bold,
>>>>>> one other...
>>>>>>
>>>>>>> From papers of Peter Kirsten and Robert Kahn, it looks like  
>>>>>>> seismic
>>>>>>
>>>>>> data transfer was an important reason to pursue SATNET,  
>>>>>> presumably
>>>>>> particularly so in the context of the Mansfield Amendment ---  
>>>>>> were
>>>>>> there other important reasons?
>>>>>>
>>>>>> The sequence for SATNET as I understand it is
>>>>>>
>>>>>> ------------------
>>>>>> Background events re seismic data....
>>>>>> 1957 - 'Rainier', US first underground nuclear test, detected by
>>>>>> seismic instruments across the globe
>>>>>> 1963, Limited Test Ban Treaty, 116 nations commit to underground
>>>>>> testing
>>>>>> 1970, US starts recieving seismic data from NORSAR at Kjeller,  
>>>>>> Norway
>>>>>> (seismic data went by cable from Norway to UK and then by  
>>>>>> satellite to
>>>>>> US).
>>>>>> 1972, seismic data goes to US through Sweden by Satellite
>>>>>>
>>>>>> -------------------
>>>>>> 1973, ARPANET connects by satellite to UCL and University of  
>>>>>> Hawaii
>>>>>> 1975, SATNET initiated - US link to UK (British Post Office and  
>>>>>> UCL)
>>>>>> using Intelisat IV
>>>>>> 1977, Norweigan Defense Establishment link by satellite
>>>>>>
>>>>>> Does this sound right?
>>>>>>
>>>>>> Johnny
>>>>>>
>>>>>> --
>>>>>> My Next Book... http://johnnyryan.wordpress.com/books/net-history-2010/
>>>>>
>>>>>
>>>>
>>
>>